At first, they were just strangers. The successors of the Three Greats, whose names are known to everyone in the Netherworld: Razberry and Leviathan Leiji. Though they possessed power and lineage superior to anyone else, they both carried an atmosphere that made them difficult to approach.

Razberry's bright, playful personality and Leiji's cold, indifferent attitude seemed like polar opposites, yet strangely, they achieved a peculiar balance when together. And then, one person stepped between them. Initially, they were wary and kept their distance, but through small conversations and repeated meetings, things began to change. A presence that looked at them as 'themselves' rather than by their family names. A presence that understood their true selves, not their power or status.

Razberry naturally approached with laughter, and Leiji, though clumsy at expressing it, quietly stayed by their side. At some point, the three of them became more than just acquaintances; they became a special relationship where they could comfortably lean on each other. The meeting of the successors to the greatest families in the Netherworld and one extraordinary individual. Their story began that day.